Regulator for dynamo-electrsc machines



. (No Model) J. E. GILES.

REGULATOR FOR DYNAMO ELECTRIC MACHINES. N0,-290',412. Patented Dec. 18, 1883.

WITNESSES INZETOR 2 C? I BY i C H Mk/ v ATTORNEYS.

N. PETERS, Phohrljlhognphar. Wuhnghvl. 11c

' tions inthe strength of the current, and a very Unrrnn rarns Parent J. EDXVIN GILES, OF HAZLETON, PENNSYLVANIA.

REGULATOR FOR DYNAMO-ELECTRIC MACE-HE EES.

SPECIFICATION forming part of Letters Patent No. 290,412, dated December 18, 18853.

Application filed September 1, 1853.

T0 all whom it may concern:

Be it known that I, J .EDWIN Guns, of Hazleton, in the county of Luzerne and State of Pennsylvania, have invented a new and Improved Current-Regulator for Dynamo-Electric Machines, of which the following is a full, clear, and exact description.

My invention relates to the class of currentregnlators in which the commutator-brush is moved toward or from the neutral point. Regulators of this class, as heretofore constructed, move the brushes with a uniform speed, and are in no way influenced in the speed of their movement by variations in the strength of the current. Consequently a sudden and great augmentation of the current endangers the armature, destroys the carbon filaments of incandescent lamps, and renders the light of are lamps unsteady. My improvement is designed to obviate all these difficulties by insuring a gradual movement of one or both of the commutator brushes under all ordinary variarapid movement of one or both brushes with a sudden and considerable increase in the strength of the current.

My invention consists in the combination, with the swiveled brush-holder of a, dynamoelectrie machine, of a regulating-screw capable of being revolved slowly in either direction by pawl-and-ratchet mechanism operated by the power driving the dynamo, and controlled by electro-magnets receiving a current from the dynamo.

It further consists in apparatus for imparting to the regulating-screw a more rapid movement, the said apparatus being controlled by another set of magnets affected only by a strong current.

Reference isr-to be had to the accompanying drawings, forming part of this specification, in which similar letters of reference indicate corresponding parts in both the figures.

Figure l is a side elevation of my improved current-regulator. Fig. 2 is a front view, and Fig. Sis a detail view of the mechanism for throwing the friction-wheels into gear.

Upon the shaft of a dynamo-electric machine, or upon a bearing concentric therewith, is placed the brush-holder A, which is capable of turning on its bearing in either direction. The brush-holderAhas an arm, B, sup- (No model.)

porting the ordinary commutator-brush, C, in contact with the commutator-cylinder D. A slotted arm, E, projects from the brushholder and receives into its slot a pin projecting from the nut a on the screw a, formed on the shaft F. The screw-shaft F is journaled in a box, I), on the dynamo, and in a frame, G, secured to the dynamo-base. A friction-wheel, H, ratchet-wheel I, and oscillating plate J are placed 011 the screw-shaft F, near the frame G, in the order named, the friction-wheel H being nearest the frame. The oscillating plate J moves upon the screw-shaft F, while the friction-wheel H and ratehct-wheel I are fixed to the shaft.

A shaft, K, having upon one end a pulley, e, and upon the other end a friction-wheel, (I, is journalcd in a frame, L, pivoted to the frame G, and capable of being inover'llaterally. The friction-wheel d carries a crank-pin, e, which connectswith the stud f on the oscillating plate J by means of the connecting-rod 1 The pulley 0 takes power through a belt from some part of the dynamo, or from other suitable souree, and as the shaft K revolves the plate J is oscillated. The upper corners of the plate J project above the ratchet-wheel, and carry two opposite]y-arranged pawls, h h. A pin, 2', projects from the side of each pawl, and is pressed by aspring, j. Below the spring a three-arm lever, 7. is pivoted to the plate J. The arms Z Z of the lever in are pressed by the pins 1' ofthe pawls h 72, and the arm on of the said lever extends downward between two eleetromagnets, n a, secured to the oscillating plate J, and the said arm on carries an armature, m, common to both magnets. The lower end of the arm m is connected with two spiral springs, 0 0, extending in opposite directions and secured to the plate J. When a current is sent through one or the other of these magnets, one or the other of the pawls h h is allowed to drop sufficiently to engage the ratchet-wheel I;

To the frame G is secured an eleetro-magnet, M, with its poles facing the frame L. The frame L, being made of iron, forms the armature of the magnet M.

To an arm, p, projecting from the frame L is pivoted a right-angled lever,.q, whose vertical arm rests against a contact-screw, s, and carricsa contact-screw, z. The horizontal arm 2 aeouna of the lever Q has at its free end an armature, a, from which a wedge, 2;, projects downward between one pole of the magnet M and the frame L. Above the armature u is supported an electro-magnet, N, capable of being operated by a strong current only.

An axial magnet, O, is connected in the main circuit of the dynamo or in a shunt by its terminals w, and two wires, :0 x, convey a portion of the current to the switch P, which sends a current through one or the other of the magnets n n and through the auxiliary magnets M N whenever abnormal variations in the strength of the current occur. lhe movable core A of the axial magnet 0 carries two contact-pieces, B B, which are insulated from each other and from the core. These contact-pieces are in electrical communication with the wires me through the springs O G, these springs serving the double purpose of conveying the current and of lifting the core A and the contact-pieces B B. Below the contact-pieces B B there are two contact-pieces, D D, secured to the top of the axial magnet and insulated from each other. The contact-piece D is connected by a wire, a, with one terminal of the magnet n, and the contact piece D is connected by a wire, a, with one terminal of the magnet N.

Above the contact-pieces B B are two contact-screws, b b, insulated from each other, and connected with the terminals of the magnet by the wires 0 c. A wire, d, connects the magnet 11. with the insulated bracket 6, which supports the contact-screw s. A wire, f, connects one terminal of the magnet M with a contactpoint, g, opposite the screw t, the other terminal of the said magnet M being connected with the wire a by the wire h.

A commutator-brush, E, is supported by the pillar F below the commutator-cylinder, in position to oppose the movable brush 0. When it is desirable or necessary to have a third brush for the purpose of regulation, a stationary brush, G, is supported in contact with the top of the commutator-cylinder by a pillar, as shown in dotted lines in Fig. 2.

When the current is normal, the contactpoints B B occupy a middle position between the contact-screws b b and the contact-pieces D D; but should the current fall below the normal the core A of the axial magnet O is relieved, allowing the springs G O to raise it, together with the contact-pieces B B, bringing the said contact-pieces into contact with the screws 1) Z). Th e current then flows through the magnet 11, drawing armature m toward it, releasing the pawl h, which, being kept in constant oscillation, acts on the ratchet-wheel I, slowly turning the screw-shaft F, thereby turning the brush-holder A, advancing the bruslpO toward the position of maximum current. WVhzemthe current arrives at its normal dle position between the magnets a n, and in so doing will disengage the pawl h from the ratchet-wheel I. Should the current increase in strength, the core A will be drawn downward until the contact-pieces B B touch the contact-pieces D D, when the current will flow through the wire a, magnet a, wire (1, bracket 0, screws, lever q, wire f magnet N, wire a, to the contactpieces D B, through the rest of the circuit to the machine. The armature m is then drawn'toward the magnet in, the pawl his released, when it acts upon the *atchet-wheel I, causing the screw-shaft to revolve slowly and move the brush 0 toward the point of minimum current, and when the current is reduced to its normal condition, contact between B D and B D is broken and the pawl h is disengaged from the ratchetwhecl; but should the current increase to an extraordinary extent the magnet N becomes active, drawing up the armature u, thus removing the wedge 12 from between the magnet M and the frame L, at the same time breaking contact between the lever q and screw 8 and making contact between the screw it and contactpoint g. The magnet n is by this means rendered inactive, allowing the pawl h to be withdrawn from the ratchet-wheel, and at the same time the current is made to pass from wire a through the wire h, magnet M, wire f, contact 9, screw 25, lever q, wire f, magnet and through the rest of the cir- N, wire a cuit to the dynamo. The magnet M draws the pivoted frame L forward, bringing the friction-wheel d into con tact with the frictionwheel H, when the screw-shaft F is rapidly revolved, bringing the brush 0 quickly toward the point of minimum current. Then the current attains its normal strength, contact between the pieces B D and B D is broken, and all of the parts regain their normal position.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent 1. In a current-regulator for dynamo-electric machines, the combination, with a regulating-screw, a ratchet-wheel, an oscillatingplate, and means, substantially as described, for oscillating the same, of two electro-magnets, an armature common to both magnets, and springs for returning the armature to its normal position when released by either of the magnets, the pawls, magnets, armatures, and springs being carried by the oscillating plate, as set forth.

2. In a current-regulator for dynamo-electric machines, the combination, with the movable commutator-brush, of two electrically-controlled trains of regulating mechanism, one for imparting a slow movement to the brush under ordinary changes of the current, and the other for imparting a rapid movement to the brush under extraordinary changes in the current.

3. In a current-regulator for dynamo-elem tric machines, the combination, with the magnets n a and auxiliary magnets M N, of the axial magnet 0, provided with c0ntact-pieces D D and the contact-screws b b, and its-core provided with the contact-pieces B B, substantially as herein shown and described.

4. In a current-regulator for dynamo-electric machines, two opp ositely-arranged pawls, h h, the three-arm lever m, magnets a a, oscillating plate J, and ratchet-wheel I, in combination with the brush-regulating screw.

5. The combination, in a current-regulator for dynamo-electric machines, of the frictionwheel (I, swinging frame L, and magnet M, with the friction-wheel H and brush-regulating screw.

6. In a current-regulator for dynamoelectrio machines, the magnet N and lever q, provided with the wedge 12 and armature a, in combination with the pivoted frame L.

7. In a current-regulator for dynamo-electric machines, the magnets M N, lever q, pivoted frame L, and frictiorrwheels cl H, in combination.

8. In a currentregulator for dynamo-electric machines, the magnet N, adapted to be affected by strong currents, the armature-le- J. EDIVIN GILES.

Witnesses:

G. F. KIsNER, E. S. Donn. 

